Magnetic flame-welding machine



W. I. BUCKLEY.

MAGNETIC FLAME WELOINGMACHINE.

, APPLICATION FILED OCT- 31, I918. 43,346.

mm June 15, 1920.

INVENTOR rel bodies, sheet-metal parts,

UNITED STATES PATENT oerce.-

WILLIAK J. BUCKLEY, OF EAST ORANGE, NEW JERSEY, ASSIGNOR 'TO DAVIS-' BOUBNONVILLE COKPANY, OF NEW YORK, N. Y A CORPORATION 01' NEW YORK.

To all whom it may concern:

Be it known that I, WILLIAM J. 'BUOKLEY, a citizen of the United States, and a resident of East Orange in the county of Essex and State of New jersey, have invented a new and useful Magnetic Flame-Welding Machine, of which the following is a specification.,

The invention is concerned with the problem of butt-welding the edges of sheets, barlarge diameter tubes, and other and plates, by the autogenous welding flame in automatic machmery, and is an improvement within and upon the disclosure of my Patent, No.

1,335,87 3, dated April 6, 1920.

The magnetic holder is preferably characterized by narrow or strip-form polar faces, afi'ordin adjacent opposite sides of theseam. It is also desirable so to organize themagnetic circuit as to cause the magnetic flux to pass through the work across the seam. An advantageous construction comprises a holding magnet of general horseshoe or elongated box-likeform disposed at one side of the work in position to embrace with its polar faces the vertical plane of the seam.

. In the accompanying drawing forming a part hereof: Figure 1 is a side elevation, partly broken away and in section, of a simple apparatus embodyin the invention;

Fig. 2 is an enlarged cross-section; and Fig. 3 is an enlarged fragmentary side elevation showing a modification.

The drawing indicates at 1 an oxyacetylene or other autogenous welding torch. This is mounted adjustably on a carriage 2 which may be propelled at predetermined uniform speed along a bar 3 by a screw shaft 4:, which may be understood to be rotated by, power and subject to speed-controlling means, not shown. The bar shown supported at their. opposite ends in uprights; 5, but it will be understood that a proj-edting arm construction may be used instead, and that in general these parts are merely representative of suitable means for delivering the welding flame and for supporting said means in definite relation to the work' and \for effecting relative welding travel between the flame and the work lenlgthwise of'the seam.

he preferred form of the electro-mag- Specification of Letters Patent.

parallel ,lines of holding and shaft are nnonn'rro r nnun-wnnnme mncnmn.

Patented June 15,1920.

Application filed. October 81, 1918. Serial No. 280,480.

netic means comprises a trough-like or elongated box-like, horseshoe-style magnet 6, which is shown supported at its ends upon the uprights, but which may also be a proectmg arm. This magnet comprises longitudinal side members or pole pieces 7 connected and spaced by a core 8 and bolts 9. The core 8 of Figs. 1 and 2 extends lengthwise, and bears a coil 10, likewise wound lengthwise, but, as indicated in Fig. 3, a series of individual cores and coils 8?, 10 may be employed. 4 a

The magnet is disposed imposition to embrace the plane of the seam a and the portions 11 of its pole pieces which are adjacent the work are extended inward toward each other, into proximity they bear raised, strip-form polar holding faces 12 and 13.0f opposite sign, the face 12 being regarded as positive or a north pole, and the face 13 as negative or south.

to the .seam, where The drawing shows pole faces approximately twice as wide as the thickness of the metal of the sheets?) and 0, but narrower faces may be employed with advantage if the surfaces of the poles and work are smooth and make good contact; conversely, with greater unevenness the faces must be made wider. v

Strips 14 are weldedonto the pole pieces in the angles of the lips 15' bearing the stripform pole faces; and the passages 16 thus formed in or on the holding portions are connected at their ends with pipes 17, 18, by means of .which a circulation of cooling medium is maintained during the welding operation. This preserves the efliciency of the seam-holder, which would otherwise be impaired by the demagnetizing effect of the heat of the flame.

In the illustrated construction, the torch is above the; work, and the magnetic holder beneath,'the sheets I), a being laid upon the poles, but this arrangement may be varied.

The work is represented as being two flat eral the holdin means may be specificallydesigned for di erent kinds of manufacture. With a construction such as'illustrated a powerfulgrip is secured upon the two'p'sfl'ts) to be united at regions adjacent the seam by means located at one side of the work,

the edges being thus held in butt relation to eachother and against displacement relatively to the flame. In addition, when the work is placed against the poles and the magnet energized, the magnetic force will shift the parts inward, as indicated by the arrows-in Fig. 2, so as positively to cause the edges to abut at the central plane, and in some instances this action may be strong enough to cause a thickening of the Weld when the edges become fused.

What I claim as new is:

1. In apparatus for welding sheets and the like by the autogenous flame, the combination of mechanically supported means for delivering the flame upon the edges to be united, and elongated box-like electromagnetic means embracing the plane of the seam for holding the parts of the work with their edges in opposed relation.

2. Apparatus for welding sheets and the like by the autogenous flame, having mechanically supported means for deliverin the flame upon the edges to be united, and in combination therewith eleetro-magnetic means having holding portions of opposite polarity at oppositesides of the plane of the seam, adapted to hold the parts of the work against said polar portions with their edges in opposed relation and simultaneously to draw the parts together.

3. Apparatus for welding sheets and the like by the autogenous flame, having mechanically supported means for delivering the flame upon the edges to be united, and in combination therewith electro-magnetic means for holding the parts of the work in opposed relation, constructed to cause the magnetic flux to pass across the seam.

4. Apparatus for welding sheets and the polar holding faces at opposite sides of the 4 plane of the seam.

6. Apparatus for welding sheets and the like by the autogenous flame, having mechanically supported means for delivering the flame upon the edges to be united, and characterized by electro-magnetic means for holding the parts with their edges in opposed-relation comprising longitudinal members the pole-face portions of which approach each other and possess narrow polar holding faces at opposite sides of the plane of the seam and a core portion with energizing means connecting said side members.

7. Apparatus for welding sheets and the like by the autogenous flame, having mechanically supported means for delivering the flame upon the edges to be united, and characterized by electromagnetic means for holding the parts with their edges in opposed relation, the magnetic circuit of said means having strip-form polar faces of opposite sign disposed at opposite sides adjacent the plane of the seam, across which the magnetic flux is caused to flow.

j WILLIAM J. BUCKLEY. 

